Charles Manson’s Family may have committed more than twice as many killings as previously believed, the Los Angeles Times reports:

Los Angeles police officials said they hope to bring closure to the families of victims in a dozen unsolved homicides that occurred near places where the Manson family operated during its slew of murders four decades ago. Officials revealed Thursday that they hope audiotapes recorded in 1969 between Charles Manson follower Charles “Tex” Watson and his attorney could provide some answers.

Watson is serving a life sentence for his role in some Manson killings. He has been fighting to limit the Los Angeles Police Department’s access to the tapes.

This spring, a U.S. Bankruptcy Court judge in Texas granted the LAPD’s request to review eight cassette tapes containing hours of conversations between Watson and his late attorney. Watson’s new attorney appealed, and the case was stalled.